Fabricated open-web stair manufactured based on prestressed thin plates

Abstract

The utility model discloses an assembly type open-web stair manufactured based on prestressed thin plates. The assembly type open-web stair comprises the prestressed thin plates and hollow step plates. An external prestressed rib plate is arranged on the side edge of the top of the prestressed thin plate; a bottom plate is arranged at the top of the external prestressed rib plate; according to the utility model, the hollow step plate and the bottom plate are manufactured, and when the concrete is not hardened after being poured, the hollow step plate is integrally hoisted and placed on the external prestressed rib plate and the internal prestressed rib plate, so that the joint bars at the bottoms of the hollow step plate and the bottom plate are inserted into the external prestressed rib plate and the internal prestressed rib plate which are not hardened; connecting ribs at the lower parts of the external prestressed rib plate and the internal prestressed rib plate are inserted into the prestressed thin plate which is not hardened; through the combination of the prestressed hollow step plates, under the condition that the whole staircase meets the standard requirements, each group of staircase is light in weight, excellent in performance and convenient to transport and hoist on site, meanwhile, workers can conveniently install and operate the staircase, and dangerousness is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of stairs, in particular to an assembled open-web stair made of prestressed thin plates. Background Technique

[0002] With the development of modern building technology, modularization and prefabrication have become trends. The traditional cast-in-situ stair construction method is time-consuming, laborious, and energy-consuming. The precast assembled concrete technology can shorten the construction period, reduce costs, ensure the quality of buildings, save energy and resources, and reduce the adverse impact of construction waste on the environment through factory prefabrication and on-site assembly.

[0003] However, for the widely used precast reinforced concrete slab stairs, since the treads are solid triangular concrete structures and there are many special molds, the overall weight of the stairs is relatively heavy, and the material and formwork costs are high. As a result, a larger tower crane model is required for the assembly of precast stairs, which is not convenient for transportation and on-site hoisting, increasing the construction machinery cost. In view of this, we introduce an assembled open-web stair made of prestressed thin plates. Content of the Utility Model

[0004] The purpose of the utility model is to provide an assembled open-web stair made of prestressed thin plates to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: An assembled open-web stair made of prestressed thin plates, comprising: prestressed thin plates and hollow tread plates;

[0006] Outer prestressed rib plates are arranged on the top side edges of the prestressed thin plates. There are two groups of outer prestressed rib plates, and a bottom plate is arranged on the top of the outer prestressed rib plates;

[0007] The hollow tread plates are arranged on the top of the bottom plate. Inserted bars are equidistantly arranged at the bottom of the bottom plate. The arrangement of the inserted bars can increase the strength of the bottom plate. The inserted bars are inserted into the interior of the outer prestressed rib plates to facilitate forming installation and fixation;

[0008] A support mechanism is arranged between the prestressed thin plates and the bottom plate. Through the combined use of the inner prestressed rib plates and the open web of the support mechanism, and there are two groups of inner prestressed rib plates, so as to reduce the weight of the stairs.

[0009] Preferably, the support mechanism includes reinforcing bars arranged inside the inner prestressed rib plates. The reinforcing bars increase the strength of the inner prestressed rib plates. The inner prestressed rib plates are connected between the prestressed thin plates and the bottom plate.

[0010] Preferably, an open web is formed between the hollow tread plates, the prestressed thin plates, the outer prestressed rib plates and the inner prestressed rib plates.

[0011] Preferably, a hollow groove is formed inside the hollow tread plate, and the hollow groove reduces the weight of the hollow tread plate.

[0012] Preferably, a prestressing tendon is connected inside the external prestressed rib plate, and the prestressing tendon facilitates increasing the overall strength of the external prestressed rib plate. A connecting rib is connected to the bottom of the prestressing tendon inside the external prestressed rib plate, and the connecting rib increases the strength of the external prestressed rib plate. The connecting rib is inserted into the prestressed thin plate for easy fixation.

[0013] Preferably, transverse steel bars are provided inside the prestressed thin plate, and the transverse steel bars facilitate increasing the overall strength of the prestressed thin plate.

[0014] Preferably, the widths of the external prestressed rib plate and the internal prestressed rib plate are 5 - 6 cm.

[0015] Preferably, the height of the prestressed thin plate is 5 - 6 cm.

[0016] Preferably, the length of the inserted bar is 10 mm.

[0017] Preferably, the height of the hollow tread plate is 150 mm, and the hollow tread plate is L-shaped.

[0018] Preferably, the heights of the external prestressed rib plate and the internal prestressed rib plate are 130 mm.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows: The hollow tread plate and the bottom plate are made by the special production line of the present utility model. The special inserted bar with a length of 10 mm is arranged at the bottom of the bottom plate. Secondly, the external prestressed rib plate and the internal prestressed rib plate are made by the pretensioning method on the long-line bench. Connecting ribs are arranged at the lower part. When the concrete pouring has not hardened, the whole hollow tread plate is hoisted and placed on the external prestressed rib plate and the internal prestressed rib plate, so that the inserted bars at the bottom of the hollow tread plate and the bottom plate are inserted into the external prestressed rib plate and the internal prestressed rib plate that have not hardened. After curing, the external prestressed rib plate and the internal prestressed rib plate reach more than 75% of the actual strength. Thirdly, the prestressed thin plate is made on the long-line bench. When the concrete pouring has not hardened, the external prestressed rib plate and the internal prestressed rib plate made in the second step and the hollow tread plate are hoisted integrally through a special device and placed on the prestressed thin plate, so that the connecting ribs at the lower part of the external prestressed rib plate and the internal prestressed rib plate are inserted into the prestressed thin plate that has not hardened.

[0020] By combining the above-mentioned prestressed hollow tread plates, the weight of each group of stairs can be light, the performance can be excellent, which is convenient for on-site transportation and hoisting, and is also convenient for the installation operation of the staff and reduces the danger while meeting the specification requirements for the whole staircase.

[0021] With advantages such as light self-weight, no need for customized molds in the manufacturing process, and high production efficiency using long-line benches, including prestressed thin plates, external prestressed rib plates, internal prestressed rib plates, and hollow tread plates, and fixedly connecting the three, it can significantly reduce the material usage while improving the structural performance, i.e., crack resistance and stiffness, improving the hoisting and transportation conditions, reducing the self-weight of the stairs by more than 55%, minimizing the usage of special molds, and reducing the overall cost by more than 50%. Brief Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of the first perspective of the present invention;

[0023] Figure 2 It is a schematic structural diagram of the side view of the present invention;

[0024] Figure 3 It is a schematic structural diagram when the hollow tread plate and the bottom plate of the present invention are connected;

[0025] Figure 4 It is a schematic structural diagram of the external prestressed rib plate of the present invention.

[0026] In the figure: 1, prestressed thin plate; 2, external prestressed rib plate; 3, transverse steel bar; 4, hollow; 5, hollow tread plate; 6, internal prestressed rib plate; 7, reinforcing rib; 8, inserted bar; 9, hollow groove; 10, bottom plate; 11, connecting bar; 12, prestressing tendon. Detailed Description of the Embodiment

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0028] Please refer to Figures 1-4 , the present invention provides a technical solution: an assembled hollow stair based on the production of prestressed thin plates, including: a prestressed thin plate 1, an external prestressed rib plate 2 is arranged on the top side of the prestressed thin plate 1, and a bottom plate 10 is arranged on the top of the external prestressed rib plate 2;

[0029] A hollow tread plate 5, the hollow tread plate 5 is arranged on the top of the bottom plate 10, inserted bars 8 are arranged at equal intervals on the bottom of the bottom plate 10, and the inserted bars 8 are inserted into the inside of the external prestressed rib plate 2;

[0030] A support mechanism is provided between the prestressed thin plate 1 and the bottom plate 10. By the combined use of the internal prestressed rib plate 6 and the hollow cavity 4 of the support mechanism, the weight of the staircase is reduced.

[0031] The support mechanism includes a reinforcing rib 7 disposed inside the internal prestressed rib plate 6. The reinforcing rib 7 increases the strength of the internal prestressed rib plate 6. The internal prestressed rib plate 6 is connected between the prestressed thin plate 1 and the bottom plate 10. The combined use is as follows: (multiple) hollow cavities 4 are formed among the hollow tread plate 5, the prestressed thin plate 1, the external prestressed rib plate 2, and the internal prestressed rib plate 6.

[0032] A hollow groove 9 is formed inside the hollow tread plate 5. The provision of the hollow groove 9 reduces the weight of the hollow tread plate 5.

[0033] Prestressing tendons 12 are connected inside the external prestressed rib plate 2. The prestressing tendons 12 facilitate increasing the overall strength of the external prestressed rib plate 2. Connecting ribs 11 are connected to the bottom of the prestressing tendons 12 inside the external prestressed rib plate 2. The connecting ribs 11 increase the strength of the external prestressed rib plate 2. The connecting ribs 11 are inserted into the prestressed thin plate 1 for easy fixation.

[0034] Transverse steel bars 3 are provided inside the prestressed thin plate 1. The transverse steel bars 3 facilitate increasing the overall strength of the prestressed thin plate 1.

[0035] The widths of the external prestressed rib plate 2 and the internal prestressed rib plate 6 are 5 - 6 cm.

[0036] The height of the prestressed thin plate 1 is 5 - 6 cm.

[0037] The length of the inserted steel bar 8 is 10 mm.

[0038] The height of the hollow tread plate 5 is 150 mm. The hollow tread plate 5 is L-shaped.

[0039] The heights of the external prestressed rib plate 2 and the internal prestressed rib plate 6 are 130 mm.

[0040] Specifically, during use, first, the hollow tread plate 5 and the bottom plate 10 are manufactured on a special production line. A special reinforcing bar 8 with a length of 10 mm is provided at the bottom of the bottom plate 10. Secondly, the external prestressed rib plate 2 and the internal prestressed rib plate 6 are manufactured by the pretension method on a long-line bench. Connecting bars 11 are provided at the lower part. When the concrete pouring has not hardened yet, the hollow tread plate 5 is hoisted as a whole and placed on the external prestressed rib plate 2 and the internal prestressed rib plate 6, so that the reinforcing bars 8 at the bottom of the hollow tread plate 5 and the bottom plate 10 are inserted into the unhardened external prestressed rib plate 2 and internal prestressed rib plate 6. After curing, the external prestressed rib plate 2 and the internal prestressed rib plate 6 reach more than 75% of the actual strength. Thirdly, the prestressed thin plate 1 is manufactured on the long-line bench. When the concrete pouring has not hardened yet, the external prestressed rib plate 2 and the internal prestressed rib plate 6 manufactured in the second step and the hollow tread plate 5 are hoisted as a whole through a special device and placed on the prestressed thin plate 1, so that the connecting bars 11 at the lower part of the external prestressed rib plate 2 and the internal prestressed rib plate 6 are inserted into the unhardened prestressed thin plate 1.

[0041] In this way, by combining the above-mentioned prestressed hollow tread plates 5, the weight of each set of stairs can be made light, the performance can be excellent, the transportation and hoisting on site can be facilitated, and at the same time, it is also convenient for the installation operation of the staff and the danger can be reduced while meeting the specification requirements.

[0042] It has the advantages of light self-weight, no need for customized molds during the manufacturing process, and high production efficiency using a long-line bench. It includes a prestressed thin plate 1, an external prestressed rib plate 2, an internal prestressed rib plate 6, and a hollow tread plate 5, and the three are fixedly connected. It can significantly reduce the material consumption while improving the structural performance (crack resistance and stiffness), improving the hoisting and transportation conditions (the self-weight of the stairs is reduced by more than 55%), and minimizing the use of special molds to the greatest extent, and the overall cost is reduced by more than 50%.

[0043] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An assembled hollow staircase made of prestressed thin plates, characterized in that: include: A prestressed thin plate (1), wherein an outer prestressed rib plate (2) is arranged on the top side of the prestressed thin plate (1), and a bottom plate (10) is arranged on the top of the outer prestressed rib plate (2); A hollow tread plate (5), wherein the hollow tread plate (5) is arranged on the top of a base plate (10), and the bottom of the base plate (10) is provided with dowel bars (8) at equal intervals, and the dowel bars (8) are inserted into the interior of the external prestressed rib plate (2); A support mechanism is provided between the prestressed thin plate (1) and the bottom plate (10), and the weight of the staircase is reduced by using the internal prestressed ribs (6) and hollow spaces (4) of the support mechanism in combination.

2. The assembled hollow staircase made of prestressed thin plates according to claim 1 is characterized in that: The support mechanism comprises reinforcing ribs (7) arranged inside an internal prestressed rib plate (6), and the internal prestressed rib plate (6) is connected between the prestressed thin plate (1) and the bottom plate (10).

3. The assembled hollow staircase made of prestressed thin plates according to claim 1 is characterized in that: A hollow space (4) is formed between the hollow tread plate (5), the prestressed thin plate (1), the outer prestressed rib plate (2) and the inner prestressed rib plate (6).

4. The assembled hollow staircase made of prestressed thin plates according to claim 1 is characterized in that: A hollow groove (9) is provided on the inner side of the hollow tread plate (5).

5. The assembled hollow staircase made of prestressed thin plates according to claim 1 is characterized in that: The interior of the external prestressed rib (2) is connected to a prestressed rib (12), and the interior of the external prestressed rib (2) is connected to a connecting rib (11) at the bottom of the prestressed rib (12), and the connecting rib (11) is inserted into the interior of the prestressed thin plate (1).

6. The assembled hollow staircase made of prestressed thin plates according to claim 1 is characterized in that: Transverse steel bars (3) are arranged inside the prestressed thin plate (1).

7. The assembled hollow staircase made of prestressed thin plates according to claim 1 is characterized in that: The width of the outer prestressed ribs (2) and the inner prestressed ribs (6) is 5 to 6 cm.

8. The assembled hollow staircase made of prestressed thin plates according to claim 1 is characterized in that: The height of the prestressed thin plate (1) is 5 to 6 cm.

9. The assembled hollow staircase made of prestressed thin plates according to claim 1 is characterized in that: The length of the inserted rib (8) is 10 mm, the height of the hollow tread plate (5) is 150 mm, and the hollow tread plate (5) is L-shaped.

10. The assembled hollow staircase made of prestressed thin plates according to claim 1 is characterized in that: The height of the outer prestressed ribs (2) and the inner prestressed ribs (6) is 130 mm.

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